Automatic chuck for paper rolls



March 17, 1931. T, T, POPE 1,796,534

` AUTOMATIC CHUCK FCR PAPER ROLLS Filed May 9, 1927 2 Sheets-Sheet 1March 17, 1931. T, T, POPE AUTOMATIC CHUCK FOR PAPER ROLLS 2sheets-sheet 2 Filed May 9, 1927 Patented Mar. 17, 1931 l UNITED YsrresPATENT vori-"ic TURNERI T. POPE, OF HOUSTON, TEXAS, ASSIGNOR OF ONE-HALFT Gr. L. MIMS, OF

HOUSTON, TEXAS AUTOMATTC CHUCK FOR PAPER `ROLLS Application led. May 9,1927. Serial N0. 189,846.

My invention relates to chucks for gripslightly different construction,but embodyping rolls of print paper and the like to the ing` theinvention. I shafts of the press upon which the paper is ALike numeralsare employed to designate used. y like parts in all the views.

The chucks employed in securing rolls of In Fig. l the roll of paper lis shown as 55- paper to the supporting shafts upon the press, mountedupon a shaft 2 supported in the must be loosened andV removed each timea frame 3 of the press. At one end, the shaft new roll is mounted onlthe shaft for use. projects beyond the frame and has thereon rlhe chucksnow most commonly employed tension device in the nature of a brake. It

are objectionable from the fact that they comprises a grooved drum 4keyed to the Go come loose easily when in use and allow slipshaft.Fitting about the drum is a clamping page of the roll on the shaft andcause Iinjury band 5 made up of two semi-circular memto the core of theroll. Furthermore, the bers hinged at 6 to a threaded pin 7. Theupgripping means engages so large a portion of per ends of the membersare equipped with i i5 the` paper on the core that it is impossible to atension screw 8 by means of Which the prese5 unreel all" of the paperdue to the grip of the Suf@ 0f the band may be adjusted upon the chuckon the paper. A large quantity of drum in an obvious manner. The pin 7is paper is thus Wasted at the center of each roll. IOttoh'le through ahand Wheel 9 to adjust It is an object of my invention toy provide a theposition of tlie drum relative to the frame i chuck which is easily andquickly installed or 0f the plGSS- 70 removed, and which is capable ofautomatic .The 1011 Of paper l has an inner core l0, ortightening on theshaft, When desired, by the dinarily made of pasteboard, or some similaradjustment of the tension upon the web of Composltlon, Said. core beingcylindrical in paper leaving the roll y shape and furnishing a spoolupon Which the n 42li It is a lfurther object to provide a chuck of Webof paper is Wound. The ends of the core 75 the character stated whichdoes not engage hmfe 01 Cl11&l1y il SlOt 0l1 recess 1l therein,

and niutilate mor-e than a comparatively WhlCh 1S adapted t0 leCelVoSome means small portion of the roll of paper. mounted on the shaft tohold the coreagainst It is desired that the chuck be capable of OlOIl ODthe Shaft- 30- ready adjustment for different lengths of T0 hOld theCOI@ and She T011 rmly UPOH 80 rolls of paper and be automaticallylatched the Shaft'l PFOPQT adjusted Position I em in p lace on the shaftWhere desired. P1057 a .ChllCk at each Sud 0f the 50H adapted Otherobjects of the invention residing in t0 mi Wlthm the Golfe and glP theSam@- he the particular constructionV and arrangement COHSI'UCOH 0f thsChUPk mchlds an 1111161' of the parts will be apparent from the moremandfel 01" Slew? 12 Whlcll fits Shdably upon 85 detailed descriptionwhich follows. )Phe Shaft 2 and 1S approxlmately Cyllldllal Referring'tothe drawings herewith Fig l in shape. It has its outer end formed withis a broken side view of a roll of paper mounta mdml flange 13, thereonsgld flange havmg ed upon a Shaft in the press, and employing meansthereon through which the mandrel my invention. Fig. 2 is an end View ofthe piynbe lined to the shaft in any desired po- 9o Same' Fig 3 is aCentral Virtcfl1-sect0il I contemplate the provision of means to througha T011 of Papin Shqwmg it -m pos1` automatically lock the mandrel uponthe tion upon a shaft, my invention being shovvn Y s. shaft. In Figs. lto 6 inclusive, the shaft 2 45 both'm Sectlon and 1n elevatlon- Flg- 41S a is provided with a keyvvay therein, the lovver 95 VleW 0f he Chuckmandrel, de tached .Partly side of which has teeth 14E inclined from the1n lelfatlol and Partly 1n Secton- Flg- 5 1S ends toward the middlepoint of the shaft. a slmller vlevv of the chuck Sleeve. Fig. 6 Themandrel hasashort key 27 thereon fitting is a transverse section on theplane 6-6 of into said keyway suiliciently to prevent rota- Fig, 5gFig., 7 is a section of a .Clerck et tion of said mandrel. on said,shaft. 10o

At the outer side of the flange 13 is a recess 28 in which is pivoted apawl 2) having finger 30 engaging said teeth so to automatically holdsaid mandrel in locked position.

In Fig. 7 the locking means is modified. In this case there is formed onthe inner side of the mandrel a keyway 21 adapted to receive a key 22 inthe shaft. This serves to prevent relative rotation of the mandrel onthe shaft. rlhe key is formed on its outer face adjacent the mandrelwith ratchet teech 23 inclined inwardly toward the middle of the shaft.To engage with these ratchet teeth a pawl Q-/l is mounted upon the outerend of the mandrel, said pawl having a` linger 2.3 adapted to eng1 withthe teeth Q3 of the key and held rcsiliently in that position by meansof a spring QG. Thus, when the mandrel is forced inwardly on the shaftto engage the core, the ratchet will cou-act with the teeth 23 upon thekey to prevent its movement outwardly. lllhen the chuck is to be againremoved from the roll, the pawl released from the ratchet upon the keyby a force exerted upon the upper arm of the pawl in an obvious manner.The mandrel also has at an approximately central position thereon aplurality of spaced pins or lugs 15, extending radially from theaandrel. Said pins are welded to the mandrel after the outer sleeve 16has been placed in proper position.

rlhe mandrel forms seat for chuck sleeve 1G which fits slidably on theouter eyindrieal surface of the mandrel. Said sleeve is tay ered fromits outer end inwardly and is adapted to be wedged between the mandreland the inner surface of the core 10. T he outer end of the chuck sleevehas a radially extending head 17 which is adapted to contact with theflange 13 upon tbe mandrel. rl`he inner side of the head 17 has asharpened ange 18 thereon which extends inwardly a short distance andadapted to engage about the outer side of the core l() so as to preventits undue expansion, due to the gripping of the chuck therein. l haveformed the gripping edge 18 sli ghtly larger than the core so as to alsoengage a few windings of the paper upon the roll, thereby obtaining afirm grip thereon. A key 2O is formed on the sleeve to lit within theslotted opening 11 in the core.

rlhe chu k sleeve 16 has a plurality of openings 19 therein to receivethe pins 15 on the mandrel. These openings 19 are inclined in a spiraldirection upon the mandrel and the pins 15 fit therein and the sides ofthe slots or openings provide cam surfaces upon which the pins mayslide. Then the chuck sleeve is rotated relative to the mandrel in aforward direction, the pin bearing against the side of the slot tends toforce the chuck sleeve inwardly against the roll so as to form a morerigid engagement therewith.

ln the operation of my device, one of the chucks at one end of the rollis ordinarily set rigidly upon the shaft and is not removed when a newroll is mounted thereon. The opposite chuck is removed, allowing theplacing of a new roll of paper upon the shaft and is inserted intoposition in the end of the roll with the key 20 fitting within the slotor recess 11 in the core, and when the chuck has been forced firmly intoposition, the mandrel will automatically engage and be latched to theshaft. Vith reference to Fig. 2, it will be noted that the tension uponthe shaft may be varied by the use of the tension screw 8. lWhen the webof paper is being unwound from the roll the pins 15 upon the mandrelwill be in the forward side of the slotted openings 19 in the chucksleeve. lf, however, the roll chuck is to be tightened within the core,the tension upon the shaft is increased to slow down the rotation of theshaft and the pull of the web of paper upon the roll will tend to rotatethe roll relative to the shaft so as to draw the pins toward therearward side of the slot and force the chuck sleeve inwardly so as togrip the roll more firmly. This action, as will be noted, is responsiveto the tightening of the tension screw S at any time so as to assure afirm grip upon the roll.

The advantages of my construction lie in its simple and positive actionand the ease with which it may be adjusted to grip the roll. It has afurther advantage in that very little of the paper upon the roll will bewasted, due to the action of the chuck. The use of two adjustablechucks, one at each end of the roll, prevents liability of slipping andbreaking of the core.

Having thus described the invention, what I claim as new and desired toprotect by Letters Patent is:

1. In a press, a shaft, a paper roll thereon having a cylindrical coreslotted at its ends, a mandrel on said shaft adapted to lit looselywithin the end of said core, a chuck sleeve on said mandrel fittingtightly within said core, a key thereon engaging in said slotted core, aflange on said sleeve having a sharp forwardly extending edge adapted tocut in to said roll, means to tighten said sleeve in said core, andmeans to fiX said mandrel to said shaft.

2. In a press, a shaft, a paper roll thereon, a core in said roll, amandrel on said shaft within said core, a tapered chuck sleeve on saidmandrel, an inwardly extending flange on the periphery of said chucksleeve to engage about the end of said core, and means connecting saidmandrel and sleeve, and responsive to tension on said roll, to tightensaid chuck upon the end of said core.

3. In a press, a shaft, a paper roll thereon, a core in said roll, amandrel. on said shaft Within said core, a tapered chuck sleeve on saidmandrel, an inwardly extending flange on the periphery of said chucksleeve to engage about the end of said core, and a radial pin on saidmandrel, engaging in a cam slot 1n said sleeve and arranged to forcesaid sleeve toward said roll when said sleeve is rotated slightlyrelative to said mandrel.

4. In a press shaft, a paper roll thereon having a cylindrical coreslotted at its ends, a mandrel on said shaft adapted to fit looselyWithin the end of said core, a chuck sleeve slidable on said mandrel andtting tightly Within said core, a key thereon engaging in said slottedcore, means securing said sleeve to said mandrel, means to fix saidmandrel to said shaft, a flange on said chuck sleeve, and means on saidflange to enter the Windings of paper adj aeent said core.

In testimony whereof I hereunto aHiX my signature this 5th day of May,A. D. 1927.

TURNER T. POPE.

